NOTE ON SHOCK REFLECTION COEFFICIENT
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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The shock reflection coefficient, R sub w, is defined here as the ratio of pressure drop across a reflected disturbance from a shock wave to that across the incident disturbance wave which is generated downstream of the shock. The treatment of shock reflection coefficients in the work of previous investigators is reviewed briefly. A derivation is given of a general expression for R sub w in terms of shock curvature for nonequilibrium axisymmetric flow. Sample computations show the effects of nonequilibrium flow and three-dimensionality on the behavior of R sub w. It is shown that R sub w can become infinite in these situations, although for two-dimensional ideal gas flow its magnitude is always finite and usually very small.
- Fluid Mechanics